What are the two functional groups founwhat are the two functional groups found in every amino acid? a. carbonyl and hydroxyl b. carboxyl and amino c. amino and hydroxyl d. sulfhydryl and carboxyl in every amino acid?

Which two criteria must be met before scientist can use radiocarbon dating? explain your answer

Which statement best explains why cells were observed in more detail using a compound microscope than a simple microscope? a compound microscope has greater magnification ability than a simple microscope. the compound microscope was invented before the simple microscope. a compound microscope is much easier to manufacture than a simple microscope. compound microscopes were more common than simple microscopes.

What happens when a scientific theory is shown to be an accurate description of a phenomenon?